S71GS256 datasheet(70/195 Pages) SPANSION

70 / 195 page

S29GLxxxN MirrorBitTM Flash Family

S29GLxxxN_MCP_A1 December 15, 2004

Advan ce

In form ati o n

be at VHH for operations other than accelerated programming, or device damage

may result. WP# has an internal pullup; when unconnected, WP# is at VIH.

Figure 2 illustrates the algorithm for the program operation. Refer to the Erase

and Program Operations–“AC Characteristics” section for parameters, and Figure

14 for timing diagrams.

Figure 1. Write Buffer Programming Operation

Write “Write to Buffer”

command and

Sector Address

Write number of addresses

to program minus 1(WC)

and Sector Address

Write program buffer to

flash sector address

Write first address/data

Write to a different

sector address

FAIL or ABORT

PASS

Read DQ15 - DQ0 at

Last Loaded Address

Read DQ15 - DQ0 with

address = Last Loaded

Address

Write next address/data pair

WC = WC - 1

WC = 0 ?

Part of “Write to Buffer”

Command Sequence

Yes

Abort Write to

Buffer Operation?

DQ7 = Data?

DQ5 = 1?

DQ1 = 1?

Write to buffer ABORTED.

Must write “Write-to-buffer

Abort Reset” command

sequence to return

to read mode.

(Note 1)

(Note 2)

(Note 3)

Notes:

1. When Sector Address is specified, any

address in the selected sector is acceptable.

However, when loading Write-Buffer

address locations with data, all addresses

must fall within the selected Write-Buffer

Page.

2. DQ7 may change simultaneously with DQ5.

Therefore, DQ7 should be verified.

3. If this flowchart location was reached

because DQ5= “1”, then the device FAILED.

If this flowchart location was reached

because DQ1= “1”, then the Write to Buffer

operation was ABORTED. In either case, the

proper reset command must be written

before the device can begin another

operation. If DQ1=1, write the Write-

Buffer-Programming-Abort-Reset

command. if DQ5=1, write the Reset

command.

4. See Table 12 for command sequences

required for write buffer programming.

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